From Steve Wyche on NFL.com:
A source with knowledge of the situation said Thursday that the Packers will explore trading Nick Barnett, who broke his wrist during a Week 4 game against the Detroit Lions, opening the door for Desmond Bishop to line up next to Hawk and emerge as a core player.
Trading Barnett won't happen until a collective bargaining agreement is reached between the NFL and NFL Players Association, but the eight-year veteran could have value because there aren't that many quality inside or middle linebackers available in free agency.
If Barnett can't be traded, the Packers would explore releasing him, the source said.
Barnett is due $5.5 million in salary for 2011 plus a $375,000 roster bonus and a $150,000 workout bonus.